Remove background colour from material
To get rid of the background color, you can set up your nodes like this:

This will work if you have an alpha channel in your png. Otherwise, you can do something like this to remove the black from the image:

This will make everything with a value of less than 0.001 (in other words black) transparent. If you are using eevee, you will have to change the blend mode to alpha blend and uncheck &quot;Show Backface&quot; in the material settings to make things actually transparent:

Hope this helps!